Vial adapter



FIG. 1 is a top perspective view of a vial adapter in accordance with our new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is right side elevation view thereof;

FIG. 7 is a rear elevation view thereof; and,

FIG. 8 is a bottom plan view.

The dot-dash lines in FIG. 8 depict the boundaries of the claim, and broken lines in the FIG. 4 are included for the purpose of illustrating portions of the vial adapter that form no part of the claimed design. None of the broken lines form a part of the claimed design. 

The ornamental design for a vial adapter, substantially as shown and described. 